Dia is the better app overall, scoring 8.1 to 7.9. Dia wins on 2 of the 5 scores, Speechify on 2, with 1 tied.
Office workers who juggle email, docs and meetings in the browser
Students, people with dyslexia and busy readers who prefer listening
Score by score
The details
| Feature | Dia | Speechify |
|---|---|---|
| Category | AI Assistants | AI Assistants |
| Category rank | #12 of 16 | #14 of 16 |
| Developer | The Browser Company | Speechify Inc. |
| Pricing | Free + paid plans | Free + paid plans |
| Usable for free | Yes | Yes |
| iPhone & iPad | — | ✓ |
| Android | — | ✓ |
| Mac | ✓ | ✓ |
| Windows | ✓ | ✓ |
| Web | — | ✓ |
Common questions
Is Dia better than Speechify?
Dia is the better app overall, scoring 8.1 to 7.9. Dia wins on 2 of the 5 scores, Speechify on 2, with 1 tied.
Which is cheaper, Dia or Speechify?
Dia: Free browser has no AI; Better Answers is $10 a month and Better Days $100. Speechify: Free with 10 basic voices; Premium is $29 a month or $139 a year. On value for money, Dia scores higher.
Do Dia and Speechify work on the same devices?
Only Speechify runs on iPhone & iPad, Android, Web.
Which is more private, Dia or Speechify?
Dia scores higher on privacy (8.2/10). History, chats and files are encrypted on your device, and Sync is end-to-end encrypted. AI partners can't train on your data. Dia keeps some unlinked content 30 days to improve itself unless you opt out.
Strengths and weaknesses
Dia
- Calm, uncluttered design from the makers of Arc
- Data is stored and encrypted on your device
- AI partners are barred from training on your data
- New users' free plan has no AI features
- Better Days plan costs $100 a month
- Windows version is still an early build
Dia comes from the team behind Arc and puts an AI chat beside your tabs that can read what's open and pull in context from Slack, Notion and Teams. Its Morning Brief, meeting prep and deck building are aimed squarely at office work. Privacy is better than most AI browsers, with your data stored on your device. Since August 2026, though, new users get no AI on the free plan, and the Windows version is still young.
Full Dia review
Speechify
- Reads PDFs, web pages, docs and photos of text
- Natural premium voices in 60+ languages
- Works on phone, computer and browser
- Premium costs $29 a month if you pay monthly
- Free voices sound robotic and top out at 1.5x
- App label lists tracking through your device ID
Speechify reads almost anything aloud: PDFs, web pages, emails, ebooks and photos of printed pages. It suits people with dyslexia and anyone who'd rather listen than read, and it now doubles as a voice assistant with dictation, AI summaries and AI podcasts. Apps cover your phone, computer and browser. The free voices sound robotic and stop at 1.5x speed, and Premium costs $29 a month unless you pay yearly.
Full Speechify review
